Extraction of electron density profiles with geostationary satellite-based GPS side lobe occultation signals

  • 发布时间:[2020-04-30] 来源:[学院] 点击量:[513]
作者: Li, WW (Li, Wenwen); Li, M (Li, Min); Zhao, QL (Zhao, Qile); Shi, C (Shi, Chuang); Wang, M (Wang, Meng); Fans, M (Fans, Min); Wangs, H (Wangs, Hong); Jiang, KC (Jiang, Kecai)
来源出版物: GPS SOLUTIONS  : 23  : 4  文献号: UNSP 110  DOI: 10.1007/s10291-019-0903-6  出版年: OCT 2019 
摘要: GPS radio occultation (RO) measurements recorded on the geostationary earth orbit (GEO) satellite TJS-2 have been investigated for electron density profile (EDP) retrieval. The total electron content derived from TJS-2 single-frequency excess phase is refined by a moving average filter to smooth high-frequency errors, which outperforms the single-difference technique. The side lobe GPS RO signals have been used to estimate electron densities up to several thousand kilometers in height for the first time. By comparison with the ground-based digisonde, the IRI 2016 model and the Constellation Observing System for Meteorology, Ionosphere, and Climate satellite (COSMIC) EDPs, the TJS-2 ionospheric EDPs show good agreement with correlation coefficients exceeding 0.8. The TJS-2 average NmF2 differences compared to digisondes and COSMIC results are 12.9% and 1.4%, respectively, while the hmF2 differences are 1.65 km and 1.76 km, respectively. Our results reveal that GEO-based RO signals can estimate EDPs to altitudes up to several thousand kilometers at specific locations with daily repeatability, which makes it a very suitable technique for routinely monitoring EDP variations.

版权所有: 武汉大学卫星导航定位技术研究中心 联系地址: 中国·武汉市珞瑜路129号 邮编: 430079 E-mail:gnsscenter@whu.edu.cn Tel/Fax:027-68778971/68778971(办公室) 技术支持:武汉楚玖科技有限公司